Here's a look at how they have fared in the final month of 2025:
Tata Motors CV
The automaker's total sales were up 25% at 42,508 units in December from 33,875 units last year.
It was also above Street estimates of 38,550 units.
Tata Motors PV
Total sales increased to 50,519 units in December, below Street expectations of 52,500 units. The sales were up 14% from last year's 44,289 units.
The stock was down 0.4% at ₹366 apiecr around 2.30 pm on Thursday.
Ashok Leyland
Ashok Leyland reported total sales of 21,533 units in December, above estimates of 19,833 units.
The total sales were up 27% from last year's 16,957 units.
Medium and heavy commercial vehicle sales increased 29% to 14,830 units from 11,474 units last year.
Eicher Motors Royal Enfield
Total sales increased to 1.03 lakh units in December compared to 98,333 units estimated by a CNBC-TV18 poll. The sales were also up 30% from last year's 79,466 units.
The sales of models with engine capacity up to 350 cc increased 37% to 95,480 units from 69,476 units last year. Sales of models with engine capacity exceeding 350cc declined 19% at 8,094 units from 9,990 units from last year.
Maruti Suzuki
The automaker reported total sales of 2.17 lakh units in December compared to CNBC-TV18 poll of 2.12 lakh units. The total sales were also 22.2% more than 1.78 lakh units in the year-ago period.
Its total domestic passenger vehicles sales increased 37.5% to 1.78 lakh units to 1.3 lakh units last year. Alto, S-Presso sales increased 92% to 14,225 units from 7,418 units last year.
Maruti Suzuki shares were trading flat at ₹16,686 apiece at 12.35 pm.
Steel Strip Wheels
The company's December sales value increased 22% from last year, while volumes increased 11%.
The stock was up 6.3% at ₹205.88 apiece around 11.15 am on Thursday.
Eicher Motors
The automaker's recorded total VECV sales of 10,384 units in December, up 25% from last year's 8,325 units.
The stock was down 0.5% at ₹7,276 apiece around 10.20 am on Thursday.
Mahindra and Mahindra
M&M total sales of 86,090 units in December were in-line with estimates 85,067 units. They were also up 26% from last year's 68,814 units.
Its domestic passenger vehicle (PV) sales increased 23% to 50,946 units from 41,424 units last year, but its total exports declined 9% to 2,820 units from 3,092 units in the year-ago period.
M&M reported total tractor sales of 31,859 units in December, above CNBC-TV18's poll of 26,433 units. Its total tractor sales increased 39% from last year's 22,943 units.
M&M shares were up 1.2% at ₹3,752.9 apiece around 10.05 am on Thursday.
VST Tillers
Its total power tiller and tractor sales increased 30% to 4,376 units in December from 3,372 units last year.
The stock was up 0.7% at ₹6,304 apiece around 9.30 am on Thursday.
Escorts Kubota
The automaker's total sales in December increased 38.5% to 7,577 units from 5,472 units in the previous year.
"In the short run, the Construction Equipment industry continues to face challenges from slow project mobilization, and weak rental rates & elevated costs from CEV Stage V compliance, though government infrastructure spending and fund-flow initiatives are expected to support gradual recovery into 2026," the company said.
Shares of Escorts Kubota were up 2.3% at ₹3,805.5 apiece around 9.25 am.
SML Mahindra
SML Mahindra was the first automaker to report its December sales numbers, ahead of market open.
Its total sales increased to 1,044 units in December from 626 units in the year-ago period.
Of this, its cargo vehicle sales witnessed a 76% increase to 462 units from 262 units last year, and passenger vehicle sales increased 60% to 582 vehicles from 364 vehicles in the previous year.
The stock was up 3.7% at ₹4,123.4 apiece around 9.30 am on Thursday.
KIa India
The company's December sales increased to 18,659 units from 8,957 units last year, rising 105%.
Renault India
The company recorded a 33.4% increase in its December sales to 3,845 units from the previous year.
VAHAN data and new launches in January
Meanwhile, the VAHAN registration data for December last week , pointed to another month of broad-based strength across segments.
Registrations from December 1 to 28, 2028 increased 9% from the previous year, led by strong performance in passenger and commercial vehicle segments, and three-wheelers as well. Meanwhile, the two-wheelers segment continued to lag.
The divergence between four-wheelers and two-wheelers was more pronounced in December, as per the VAHAN data.
In the two-wheeler segment, Eicher Motors and TVS Motor outperformed the broader industry, while Hero MotoCorp was the biggest underperformer. The data suggested pressure in Bajaj Auto's two-wheeler portfolio as well.
On another note, in January, Maruti Suzuki is set to launch its first electric SUV -- the e-Vitara, Mahindra and Mahindra will launch its Mahindra XUV 7XO next week, and Royal Enfield will launch its Bullet 650 motorcycle.
Auto stocks ended the previous session, also the last day of the calendar year 2025, on a positive note, up 1.1%. All 15 stocks in the Nifty Auto index reported gains, led by TVS Motor, Tube Investments of India, Eicher Motors, Bosch and Tata Motors PV. The index has gained 21.8% in 2025.
This story will continue to be updated as more numbers are reported.
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